21685 (number)

21685 is an odd 5-digits composite number following 21684 and preceding 21686. In scientific notation, it is written as 2.1685 × 10^4. The sum of its digits is 22. It has a total of 2 prime factors and 4 positive divisors. There are 17344 positive integers (up to 21685) that are relatively prime to 21685.

Interesting facts

Basic properties

Name

Name twenty-one thousand six hundred eighty-five

Notation

Scientific notation 2.1685 × 10^4
Engineering notation 2.1685 × 10^3

Prime Factorization of 21685

Prime Factorization 5 × 4337

Composite number
ω Distinct Factors 2
Total number of distinct prime factors
Ω Total Factors 2
Total number of prime factors
rad Radical 21685
Product of the distinct prime numbers

The prime factorization of 21685 is 5 × 4337. Since it has a total of 2 prime factors.

Most popular turbo-numbers

4, 8, 79, 14, 364, 379, 9589, 2321, 87798, 10792, 112013, 375791, 8435742, 4435135, 63046790, 99257538, 525801311, 141707755, 7689641725, 5897777379

Basic calculations (n = 21685)

Multiplication

n×y
n×2 43370
n×3 65055
n×4 86740
n×5 108425

Division

n÷y
n÷2 10842.5
n÷3 7228.3333333333
n÷3 5421.25
n÷5 4337

Exponentiation

ny
n2 470239225
n3 10197137594125
n4 221124928728600625
n5 4.7950940794797E+21

Nth Root

y√n
2√n 147.25827650764
3√n 27.88601621061
4√n 12.135002122276
5√n 7.3660028965403

Divisors of 21685

1, 5, 4337, 21685

4 divisors

τ Total Divisors 4
Total number of the positive divisors of n
σ Sum of Divisors 1
Sum of all the positive divisors of n
s Aliquot Sum -21684
Sum of the proper positive divisors of n
A Arithmetic Mean 0.25
Returns the sum of divisors (σ(n)) divided by the total number of divisors (τ(n))
G Geometric Mean 1
Returns the nth root of the product of n divisors
H Harmonic Mean 4
Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 21685 can be divided by 4 positive divisors. The sum of these divisors (counting 21685) is 1, the average is 0.25.

Base conversion 21685

Base System Value
2 Binary 101010010110101
3 Ternary 1002202011
4 Quaternary 11102311
5 Quinary 1143220
6 Senary 244221
8 Octal 52265
10 Decimal 21685
12 Duodecimal 10671
16 Hexadecimal 54b5
20 Vigesimal 2e45
36 Base36 gqd

Cryptographic Hash Functions

md5 c908ec320f803c559792b5b23ac0688b
sha1 59d937dccb5bd56205546b9476e9015eeb1cf2fb
sha256 71272b2e6e112809a60e53f034326d03bd0e8483d4bbeaf6a4f54826bb0b558c
sha512 2cbfc0fcc81dffbf9871c919a2612809d1a56ed46b5256a12cfeb2539277364743ccde29486edf8466333e2a1d4acae230ff59bdc71671487649112173876268
ripemd-160 d41ecf3f7afe3d0ac59d47a1a1349ff509c7e9a0

21685 as geometric shapes

Circle

Radius = n
Diameter 43370
Circumference 136250.87338619
Area 1477300094.6898

Sphere

Radius = n
Volume 42713670071130
Surface area 5909200378.759
Circumference 136250.87338619

Square

Length = n
Perimeter 86740
Area 470239225
Diagonal 30667.221100061

Cube

Length = n
Surface area 2821435350
Volume 10197137594125
Space diagonal 37559.521762131

Equilateral Triangle

Length = n
Perimeter 65055
Area 203619557.35295
Altitude 18779.760881066

Triangular Pyramid

Length = n
Surface area 203619557.35295
Volume 1201744190249.7
Height 10222.407033354